Matt Damon Hid in Ben Affleck's Coat to Surprise Jimmy Kimmel

Matt Damon and Jimmy Kimmel have serious beef. With Kimmel hosting the annual celebrity-filled post-Oscars episode of his late night show and Damon up for a Best Actor for his work in The Martian last night, you knew something was gonna go down. But going full Alien chest-burster? That's not what we were expecting.

In a twist on the classic totem pole trench trope, Ben Affleck walked onstage looking like he'd packed on some disconcerting Batman v. Superman: Dawn of Justice weight only to reveal Matt Damon clinging to his Good Will Hunting writing partner. Of course, Kimmel was having none of it and had Damon escorted from the premises by security.

Confused? The Damon vs. Kimmel rivalry goes way back to the show's early days when Kimmel would end episodes with a joke about Matt Damon being bumped for time. But things escalated quickly. There was the "I'm Fucking Matt Damon" video and the equally hilarious -- and vulgar -- response video. Then the 2010 post-Oscars show gave us the "Handsome Men's Club" video, and things have only gotten crazier from there. The pair even went to couple's therapy at one point. Nothing works. Their hate springs eternal.

Will this latest stunt bring them closer together? We'll probably have to wait till next year's Oscars to find out.

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Dan Jackson is a staff writer at Thrillist Entertainment and is startled by how much Jimmy Kimmel looks more and more like Ben Affleck. He's on Twitter: @danielvjackson.